Orion System PT-Link II LON - Manual (Page 30)

PT-Link II LON ® Technical Guide
PT-Link II Interface 30
Appendix C - VCB-X LON Parameters
SNVTs for the VCB-X Controller
Binary Output SNVTs are SNVT_lev_disc
all other SNVTs are SNVT_count_inc_f
Parameter Name Object Description Limits
Cool Staging
Window
ClStgWdw Analog
Input
In Cooling
Mode, if the
Supply Air
Temperature
drops below the
Active Supply
Air Cooling
Setpoint minus
this Staging
Window, a
Cooling Stage
will be deacti-
vated after its
Minimum Run
Time.
1 30
Adaptive
Defrost
Interval
Adjustment
AptDfr Analog
Input
Adjustment to
the Heat Pump
Defrost Interval
depending on
whether the
Defrost Mode
lasts 10 minutes
or less than 10
minutes.
0 Min 30
Min
Dewpoint
Setpoint
RhDewpSt Analog
Input
On a MUA unit,
if the outdoor
dewpoint rises
above this
setpoint, the
unit will
activate Dehu-
midifi cation.
35 80
Digital Com-
pressor Cutoff
DigCmpCf Binary
Output Occurs if
the digital
compressor
discharge tem-
perature rises
above 268°F
or the sensor
is shorted. The
compressor is
disabled.
Digital
Compressor
Lockout
DigCmpLk Binary
Output Occurs if fi ve
Digital Com-
pressor Cutoffs
occur within
four hours. The
compressor will
be locked out.
Dirty Filter
Alarm
DrtFlAlm Binary
Output Alarm that
indicates the
fi lters are dirty.
Economizer
Enabled
EcoEnbl Analog
Output
Status that
indicates
the economizer
is enabled.
SNVTs for the VCB-X Controller
Binary Output SNVTs are SNVT_lev_disc
all other SNVTs are SNVT_count_inc_f
Parameter Name Object Description Limits
Economizer
Enable
Setpoint
EcoEnbSt Analog
Input
The economizer
is enabled if the
outdoor dry-
bulb, dewpoint,
or wetbulb
temperature
falls below this
setpoint.
-30 80
Economizer
Position
EcoPos Analog
Output
Current
position of the
economizer
damper.
Max Econo-
mizer in Heat
Mode
MaxEcoHt Analog
Input
Max position
the Economizer
Damper can
open in the
Heating Mode.
Takes priority
over Max Posi-
tion in High
CO
2
.
0% 100%
Max
Economizer
in High CO2
Mode
MaxEcoCO Analog
Input
The maximum
value the
Economizer
Minimum
Position can
be reset up to
during CO
2
override.
0% 100%
Minimum
Economizer
Position
MinEcoSt Analog
Input
Minimum
position of the
economizer in
the occupied
mode.
0 100
Force
Economizer
FrcEcono Analog
Input
Overrides all
other Outdoor
Air Damper
position com-
mands so as to
maintain this
fi xed position.
Confi guring
for “Auto” will
restore normal
unit control of
the Outdoor
Air Damper/
Economizer
operation.
0% 100%
Auto=65535
Emergency
Heat Enabled
EmHtEnbl Binary
Output Shows the
Emergency
Heat is enabled
based on the
Compres-
sor Heating
Lockout.